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A kind of method that prompts ozone to produce hydroxyl free radical rapidly

A free radical and ozone technology, applied in the field of water treatment, can solve problems such as secondary pollution of the environment, and achieve the effects of reducing construction cost, speeding up speed and wide application range.

Active Publication Date: 2019-01-04
HARBIN INST OF TECH SHENZHEN GRADUATE SCHOOL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, hydroxylamine is usually a toxic organic substance, and as an ozone system accelerator, it will cause secondary pollution to the environment

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Add 12 μmol / L sodium thiosulfate and 40 μmol / L ozone to the water containing 1 μmol / L ethyl atrazine (the molar ratio of sodium thiosulfate to ozone is 0.3:1) and mix rapidly. The reaction time was 0.4s, the pH of the system was 7, and the removal rate of ethyl atrazine was 56.5%.

Embodiment 2

[0020] Add 12 μmol / L potassium thiosulfate and 40 μmol / L ozone (the molar ratio of sodium thiosulfate to ozone is 0.3:1) to the water containing atrazine at a concentration of 0.5 μmol / L and mix rapidly to react The time is 0.4s, the pH of the system is 7, and the atrazine is 90.8%.

Embodiment 3

[0022] Add 12 μmol / L sodium thiosulfate and 40 μmol / L ozone (the molar ratio of sodium thiosulfate to ozone is 0.3:1) into water containing 50 ng / L geosmin and mix them rapidly. The reaction time is 0.4s, the pH of the system was 7, and the removal rate of geosmin was 84.5%.

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Abstract

The invention belongs to the field of water treatment, and in particular relates to a method for promoting generation of hydroxyl radicals from ozone. The method comprises the following steps: feeding ozone and thiosulfate into water with pollutants, and rapidly mixing to react, thereby prompting generation of the hydroxyl radicals from the ozone. The method provided by the invention is very fast in reaction speed, can lower the cost when being used in water treatment, can promote rapid reaction in acid, neutral and alkali environments without adjusting the pH value of a water body, is free of risk of secondary pollution and is beneficial to industrial application.

Description

technical field [0001] The invention belongs to the field of water treatment, and in particular relates to a method for prompting ozone to rapidly generate hydroxyl radicals. Background technique [0002] At present, the commonly used method for treating organic pollutants is mainly oxidation treatment technology. Ozone has attracted widespread attention because of its strong oxidation ability and no secondary pollution. [0003] Although ozone has a strong oxidation ability and has been widely used in water treatment, ozone is selective for the oxidative degradation of organic matter, and has a poor removal effect on some refractory organic matter, and the oxidation of organic matter by ozone is not complete. The intermediate products formed by decomposition sometimes prevent further oxidation of ozone. With the continuous in-depth research and exploration of ozone and ozone technology, methods to improve the oxidation ability and oxidation efficiency of ozone have gradual...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F1/78
CPCC02F1/78C02F2305/023
Inventor 李继马军杨兢欣李婷婷
Owner HARBIN INST OF TECH SHENZHEN GRADUATE SCHOOL
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